额尔敦-乌日勒对MCAO/R大鼠脑前额叶皮质BDNF及NGF表达的影响

摘要

目的:探讨额尔敦-乌日勒对大脑中动脉阻塞/再灌注损伤(Middle Cerebral Artery Occlusion/Reperfusion,MCAO/R)大鼠皮质脑源性神经营养因子(Brain-Derived Neurotrophic Factor,BDNF)及神经生长因子(Nerve Growth Factor,NGF)的影响.方法:取清洁级健康SD大鼠60只,随机分为假手术组、模型组、尼莫地平片组、额尔顿-乌日勒组,采用改良Zea-Longa法,制备MCAO/R模型.实验结束后,各组大鼠麻醉、取脑,采用HE染色、SP等免疫组化方法评价脑组织病理形态学的改变情况,并且采用双抗夹心ELISA法和荧光定量RT-PCR法检测大鼠脑前额叶皮质BDNF mRNA、NGF mRNA相对表达量及其蛋白含量.结果:与模型组相比,额尔敦-乌日勒组大鼠脑前额叶皮质坏死细胞数显著减少(P＜0.05),BDNF、NGF蛋白含量及mRNA表达明显增加(P＜0.05).结论:额尔敦-乌日勒可上调MCAO/R大鼠脑前额叶皮质BDNF、NGF表达,促进星形胶质细胞活化,从而保护神经元,进而起到脑保护作用,这可能是额尔敦-乌日勒治疗“白脉”病的传统功效机制之一.%The present study aimed to explore the effects of Eerdun-Wurile on brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) expressions in the prefrontal cortex of MCAO / R injury rats.Sixty SD male rats of SPF grade were selected to establish the model of MCAO / R with Zea-Longa thread occlusion,and divided into five groups at random:the sham operation group,the model group,the nimodipine group and the Eerdun-Wurile group.After modeling,rats were anesthetized for preparing the brains.The pathomorphological changes of the brains were evaluated by immunohistochemical techniques,such as HE staining and SP.The protein and mRNA expressions of BDNF and NGF in the prefrontal cortex of rats were detected by ELISA and RT-PCR,respectively.As a result,compared with the model group,it was found that the number of necrotic cells in the prefrontal cortex were significantly reduced in the Eerdun-Wurile group (P ＜ 0.05),while the mRNA and protein expressions of BDNF and NGF were significantly increased (P ＜ 0.05).In conclusion,the BDNF and NGF expressions in the prefrontal cortex were up-regulated for stimulating the activation of astrocytes and protecting the neurons with the treatment of Eerdun-Wurile in MCAO / R injured rats,which may be the mechanism of the treatment of Eerdun-Wurile for "white vein" disease.